1. Picture This! Index Card Area #1 rectangles and triangles

2. get a 3'' x 5'' index card

3. mark off each inch

4. how many square inches? 12345 678910 1112131415

5. The area of this rectangle is 15 square inches 12345 678910 1112131415

6. Area of a rectangle base x height 12345 678910 1112131415 5 3 =

7. 12345 678910 1112131415 cut the rectangle in half diagonally Now for a triangle: a triangle!

8. The triangle is half of the rectangle 12345 678910 1112131415 A triangle = A rectangle 2

9. Area of a triangle base x height 2 = 12345 67845 112345 5 3

10. Whats the area of this rectangle? 5'' x 3'' = 15 square inches

11. Whats the area of this triangle? 5'' x 3'' = 7.5 square inches 2

12. 5'' x 2'' = 10 sq. in. Whats the area of this rectangle?

13. 5'' x 2'' = 5 sq. in. 2 Whats the area of this triangle?

14. The area of each triangle every rectangle has 2 triangles in it is 1/2 of the rectangle

15. 2'' x 3'' = 3 sq. in. 2 Whats the area of this triangle?

16. 4'' x 3'' = 12 sq. in. Whats the area?

17. (4'' x 3'') = 6 sq. in. 2 1

18. Remember A = bh 2

19. Area of a rectangle base x height 12345 12345 12345 5 3 =

20. Area of a triangle base x height 2 = 12345 12345 12345 5 3